Oil pump arrangement on internal combustion engines



Dec. 27, 1955 J. KREMSER 2,728,413

OIL PUMP ARRANGEMENT ON INTERNAL COMBUSTION ENGINES Filed July 31, 1953 FIGZ IN VENTOR. Johann Kremser ATTORNEY United States Patent OIL PUMP ARRANGEMENT-ON INTERNAL COMBUSTION ENGINES Johann Kremser, Hannover, Germany Application July 31, 1953, Serial No. 371,487

2 Claims. (Cl. 184-6) The invention relates to the arrangement of an oil pump in internal combustion engines. As is well known the arrangement of the oil pump and its drive often is difiicult because special carriers, supports, brackets, or the like have to be provided on the engine block and, furthermore, auxiliary drive elements for the pump must be available, said drive elements in turn being driven by other drive members. It is an object of this invention to simplify the arrangement and the drive of the oil pump in internal combustion engines, in that special drive elements and auxiliary feed and discharge lines for the oil are eliminated. According to the invention this is achieved by providing suction and pressure lines for the oil inside the engine cylinder block with said lines opening at one end of the engine block Where the oil pump is also connected.

Preferably the intake and the outlet lines of the pump are designed to act as a carrier for the pump housing. Together with the pump housing they form a rigid bridge whose ends are flanged for connection to the suction and pressure lines which open in the forward wall of the engine block. The flange bolts for the connection of the lines leading to the pump also serve as a carrier for the pump unit.

In accordance with this invention the pump housing together with the drive elements for the pump (gears) and the intake and outlet lines form a self-contained unit which is to be attached to the mouths of the oil lines in the engine block.

Various changes in design are possible without departing from the spirit of the invention. One embodiment is shown in the attached drawing, of which- Fig. 1 is a front elevation of a part of an engine block with the present oil pump mounted thereon.

Fig. 2 is a top plan view of the pump arrangement, with part of the engine block being illustrated in section.

Inside the engine block 1, of which a small portion only is illustrated, there are the oil suction line 2 and the oil pressure line 3. The suction line 2 leads into a line 4 which ends in the oil sump.

The engine block is machined at its front wall so that a smooth plane is provided in which end the line 3 and 2. The oil pump is fixed to the engine block 1 at the mouths of said lines. The oil pump substantially comprises a housing 5, into which enters the oil inlet line 6 and the outlet line 7. Said lines 6 and 7 form, together with said housing, a rigid bridge and are provided with flanges .8 and 9 at their ends, by means of which they are fixed to the engine block 1. The fixing bolts 10 for fixing the flange also carry the complete pump assembly and connect the intake line 6 and the outlet line 7 with the oil lines 2 and 3 inside the engine block. At the same time an overflow valve 11 is fitted in the outlet line 7.

The arrangement of the oil lines 2 and 3 as well as of the pump is laid out so that the pump is fitted below the crankshaft 12, so that the pump drive gear 13 which is journalled in the pump housing 5 is driven by a spur gear 14 on the crankshaft 12. A gear-type pump, as illustrated, or any other type of pump may be used.

I claim:

1. In an internal combustion engine having a cylinder block having passage for lubricating oil with inlet and outlet openings provided at one end of said block, and a crankshaft supported by said block, an oil pump comprising a unitary arc-shaped housing having a centrally located chamber and a pair of oppositely directed passageways provided therein each opening in an end of said housing, means for pumping oil positioned within said housing chamber, means for driving said oil pump from the end of said crankshaft corresponding to outlet and inlet openings of said block and means connecting the ends of said housing to said block with each of said housing passageway openings being in communication with one of said inlet and outlet openings.

2. In an internal combustino engine, a lubricating system therefor comprising a cylinder block having passages for conducting lubricating oil to moving elements of said engine and the oil sump thereof with the inlet and outlet openings for said passages being located at the same end of said block, a unitary housing having an annular closed center chamber and a pair of oppositely directed tubular are shaped arms extending from said chamber, oil pumping means mounted within said housing chamber, said housing arms having flanged ends capable of being connected in a fluid tight manner with said block, means for connecting said flanges to said block with each of said arm openings being in communication with one of said block inlet and outlet openings, a crankshaft rotatably supported by said block having an end positioned above said housing chamber and means operatively connecting said end of said crankshaft with said oil pumping means for driving the same.

References Cited in the file of this patent UNITED STATES PATENTS 1,421,718 Rhoads July 4, 1922 1,641,486 Heil Sept. 6, 1927 2,286,816 Kishline June 16, 1942 2,305,012 Kinnucan Dec. 15, 1942 2,440,815 Wharam May 4, 1948 FOREIGN PATENTS 347,517 Great Britain Apr. 30, 1931 

